Police in Denver say the infant was killed shortly after being born in early September.

Dotson reportedly told police she did not know she was pregnant and took her baby to the backyard after the surprise delivery. The teen reportedly told detectives that she picked up a rock and pushed it down the child's throat.

The Denver Post reports Dotson's mother called 911 after finding the baby wrapped in a bloody blanket outside.

Doctors at Children’s Hospital Colorado removed the rock from the baby's throat and pronounced her dead.